well i think that you should not do dead lifts becaus that puts a ton of stress on your lower back as so as goodmornings and the best thing for you legs is doing deep squats and box squats hex bar and front squats and you can also jump to make your legs stronger and dont worry about injury because the stronger your legs are the more lesser chance you have of injury so try them and tell me what you think and do reps of 10-8-6-4-4 that is what i do and i love it and i have a ton of leg strengh and i have never had problems with straing my muscles in my legs, so try those and tell me what you think and if you have any questions let me know and ill try to answer them